Roberts came forward claiming she had sex three times with the Duke of York when she was just 17.
Amid all the press, Prince Andrew emphatically denies the allegations against him, and even spoke publicly on the matter earlier this week.
Unsurprisingly, when Miss Roberts served papers on him through the British Embassy, they were promptly returned to sender.
The letter to the Prince states: "This is a formal request to interview you under oath at a time and place of your choosing."
The Foreign Office refused to accept the legal papers, stating that delivering documentation to a British Embassy was not the "appropriate channel" for serving them.
"Documents were incorrectly sent to our embassy in Washington," a spokesman commented on the matter. "As they were not served via the appropriate channels, we are returning the documents so they can be sent by the agreed international channels for the transmission of legal papers."
Meanwhile, Buckingham Palace continues to deny Roberts' claims.